Ok i know that Skyfall has contributed a lot to this thread and i was following this thread before i joined the forum as i feel i have something to offer as i have modded my game through much trial and error just like Skyfall has.
Anyhow here goes.
Ok firstly make sure you have a fresh clean installation of GTA4 and patch 1.0.4.0 for best results regarding lighting and features,once you have done this make a clean backup of vanilla game installed to somewhere on your Hardrive(s) as you may need to reinstall if your trying different ENB's and mods,this keeps the re-installation down to a minimum.
Firstly i used Ultimate Textures v2.0 and no other textures,just these,its quite a large download.(8 links)
http://www.gta-downloads.com/en/gta4/total-conversions/11691-gta-iv-ultimate-textures.html
I use L3VO ENB...
http://www.gta4-mods.com/misc/l3evo-3-12-enb-patch-079082-final-f7882
Although you might want to try Icehancer or BONE ENB as some people have had good results with these,they all work differently for different computers so i suggest you try both,on my PC i prefer L3V0 by along way as it gives me the best results i think.
I then used Fonias roads and pavements,there is 3 versions to this,the version im using is here...the pavements are a kind mustard/yellow but look nice.The roads are well detailed with a nice thick yellow line in the middle of them as ypu can see from the videos i uploaded.These were a pain in the ass to find btw as all the official links are broken
www.4shared.com/rar/NxbzW5wt/GTA_IV_Road_Textures_by_Fonias.html
The second version is Fonias with Pink pavements,yes PINK.
http://www9.zippyshare.com/v/13674811/file.html
Here is youtube video of road textures and pink pavements,i prefer fonias other pavements.
http://www.youtube.com/watch?v=LBWI6sNK-Bk
The 3rd version is LordNeophytes which are good also but there all pretty similar,i tried all of them and i preferred the first link,only choose 1 out of the 3.
http://www.file-upload.net/download-4229563/gtxd.rar.html
Im also using Viva new york
http://www.gtaforums.com/index.php?showtopic=439322
Im also using Viva new york flashing lights
http://www.gtaforums.com/index.php?showtopic=439322 (scroll down abit)
My carpack is this one which is important as carpacks that use a lot of data for cars can increase taxi bug so i went with this pack,personally i wouldnt go with any pack over 3-400mb TOPS!My pack is 263mb,so remember packs that use a lot of data like 500mb or 700mb can give you massive taxi bug problems even with the fix.
http://youtu.be/K_2SaDrIHVQ
Then download trafficload its the best taxifix,once you have downloaded it and extracted it there is a trafficload.ini file where you can alter the spawn rate of cars but it doesnt work if you alter the settings from there default values,it only works on the default values of 100 cars/100pedestrians....if you alter them even just a little the roads will be cleared of all cars and pedestrians.(great for driving around admiring the textures for testing)
I would suggest that you download the trafficload fix but paste this script in the relevant space and the trafficload will work with whatever you set it the values too.
[Options] //multipliers in %
CustomDensity=0 //0 is false 1 is true
PedDensityMultiplier=400 //100 is default, 50 is half, 200 is double, etc. Value has no effect when CustomDensity is 0
CarDensityMultiplier=400 //same as peddensitymultiplier
CarsPerCycle=10 //10
[AddedCars] //refer to the readme for more info
Enable=0
Amount=2
1=ambulance
2=firetruk
In order to make trafficload to work, you must have some files in gta 4 directory:
- xliveless 0.999b (xlive.dll)
- scripthook.dll (0.4.0 for patch 1.0.0.4 and 0.5.1 for patch 1.0.0.7)
- asiloader (dsound.dll) -THIS IS BAD, DO NOT DO THIS, XLIVELESS DOES THIS FOR YOU
- trafficload.ini and trafficload.asi
- msvcr100d.dll
http://www.gta4-mods.com/script/trafficload-f9780
All the other mods i have installed are realism mods(dont mistake Realizm IV for a gameplay realism mod as its a texture mod and i advise not to use it as its old now and not needed) that affect gameplay are are of personal preference,a good one is cautious drivers as people drive around in cars with there doors locked and wont open them until you pull a gun and point it at the screen which is more realistic and better than running around jacking anything.I have cash point machine,weight mod,car dealer garage,improved police AI etc etc etc.
Here is alink so you can see the realism mods and download for yourself for your preference,theres loads of great links in this thread pointing to many many mods,i recommend the realism thread.
http://www.gtaforums.com/index.php?showtopic=480297
Here is my nvidia inspector settings,im also using driver 302.59,this is the best driver for me,even the newer drivers available atm arnt as good as this driver for me.
Here are my 3 videos of the game fully modded,Daytime,Nightime and Raining,i must say i think it looks very nice and is one of the best modded versions of this game outhere.
http://www.youtube.com/user/v3teran75?feature=mhee
Finally i would suggest that you update your backup folder once you have installed a few mods and you have tested they are working,so if things do mess up you can fall back and not install everything from scratch.
On a side note this mod looks really good but i think it only works with 1.0.7.0,its a fully fledged Police officer mod and its constantly updated I will be playing this sometime when i get around to it.
http://www.lcpdfr.com/files/download/84-lcpd-first-response/# (page takes a while to load)
http://www.youtube.com/watch?v=JiaV-wu6L8k
SLI fix for Nvidia inspector.
nVIDIA's original SLI compatibility bits for GTA4 is "0x03400405". However, new SLI bits "0x42500045" seems to improve SLI scaling nicely.
http://www.forum-3dcenter.org/vbulletin/showpost.php?p=8828733&postcount=26
I forgot to say dont forget to put this in your commandline.txt.(create one)
-norestrictions
-nomemrestrict
-percentvidmem 100
-memrestrict 681574400
-memrestrict 629145600
-availablevidmem 4.0
-noprecache
-novblank
You have a 4gb card so set your availablevidmem to 4.0 as it says above,copy and paste that in or 2.0 for 2gb cards etc.